Vernon was born Hansol Vernon Choi on Wednesday, February 18, 1998, in New York City, New York, USA. He’s also known as Choi Hansol 최한솔.

Like fellow member Seungkwan, he was born in the Chinese Year of the Ox. He’s an Aquarius, like DK and Dino. He’s 176 cm or 5'9½" tall, the same height as Joshua. Vernon, Joshua, Wonwoo, Woozi, and Dino’s blood type is A.

He and Joshua both speak English. Vernon is Korean-American, half-Korean and half-white. He has a younger sister. He attended Ewha University Elementary School. His family lives in Hongdae.

Vernon appeared in Man of K’s music video for “Falling,” Hello Venus’ music video for “Venus,” and Orange Caramel’s music video for “My Copycat.” He’s a member of Seventeen’s hip-hop sub-unit.

His favorite rappers are Drake, T.I., J. Cole, and Kendrick Lamar. He admires David Bowie. He plays the guitar. Of the Seventeen members, he’s one of the ones most easily frightened.

His favorite food is chocolate. His favorite ice cream flavor is vanilla. His favorite month is December. He’s a fan of Harry Potter. For fun, he watches webtoons and reads. He ate Twix in the practice room so much that the others started to call him “Twix.”